Improvement in plows



A. B. CHAPMAN.

Revolving Moldboard.

No. 40,733. Patented Dec. 1. '186i AM.PHOTOLITHO. EILNN. (BSBDRNEL PROCESS.)

UNITED STATES PATENTl OFFICE.

AARON B. CHAPMAN, OF APIT'lSFIEL-D, MASSACHUSETTS.

IMPROVEMENT IN PLows.

Specification forming part of Letters Patent No. 40,733, dated December 1, 1863.

' To all whom it may concern:

Be it known that I, AARON B. CHAPMAN, of Pittsfield, in the county of Berkshire, State of Massachusetts, have invented a certain new and useful Improvement in Flows; and I do hereby declare the following to be a full and exact description of the same, reference being had to the accompanying drawings, making part of this specification, in which- Figure l is a perspective view of my improved plow. Fig. 2 is a side elevation thereof without the adjusting-lever, hereinafter described. Fig. 3 is a plan of the same with the said lever removed. Fig. 4 is a side elevation with the roller also removed. Fig. 5 is a rear view.v Fig. Gis a plan ofthe mold-board, share, and landside with the upper parts of the plow removed.

Similar letters of reference indicate correspondin g parts in the several views.

The subject of my invention is a plow provided with a concave conoidal roller set in a vertical, or nearly vertical, position at the rear of the mold-board for the purpose of completing the turning of the furrow-slice with better ei'ect and less friction than it is done by moldboards of common form.

The invention further consists in devicesfpr mounting and adjusting the aforesaid roller and securing the right handle.

Inorder that others skilled in the art, to which my invention appertains may be enabled to fully understand and use the same, I will proceed to describe its construction and operation.

The handle A, beam B, share C, landside D, and the front part of the moldboard E may be of common construction. F represents a lug or brace cast in one piece with or attached tothe heel of the mold-board, and extending across to the landside, to which it is attached by a flange and bolts. G is a roller of the form 0f the frustum of a conoid inverted, placed within a suitable cavity in the back ot' the mold-board in such position that the concave surface ofthe said roller will form a continuation of the mold-board and complete the turning of the furrow-slice. For this purpose the said roller is adapted to turn on a vertical shaft, H, held at its lower end in the lug F, and passing through a slot, i, in a horizontal cast-iron bracket, I, as shown in Fig. 3, in which the form of the bracket is clearly represented. In front it rests upon andapproximates to the form ofthe top ofthe mold-board, and is' firmly secured to the side of the beam. At back it is formed with jaws partially inclosing the right handle, A, and with a lateral extension, I', formed with a number of holes or notches, i', for the purpose hereinafter named, and at its end with a flange, z, by which it is securely bolted to the handle A and beam B.

J represents alever, fulcrumed at its forward end, at j, to the bracket I, and provided at its rear end with a suitable pin or projection adapted to engage in either of the holes or notches "in the transverse extension l of the bracket. The upper end of the shaft El passes through a hole in the lever J, and is screw-threaded-to receive a nut, K, by which the lever may be pressed down to hold its pin or projection in either ofthe holes or notches i in which it maybe placed, and thus secure the roller iirmly in the desired position. By turning up the nut the lever is released so as to permit the roller to be set in or out, as desired, and it is there secured by again turning down the nut K. The lower end ofthe handle H is secured by a'step, h', in the lug F.

L is a scraper attached to the handle A', or other suitable part of the implement, for the purpose of keeping the roller clear of dirt. M

represents a washer interposed between the top of the roller G and the under side of the bracket I, to permit the roller to rotate with freedom. The roller vGr kby its form and position is adapted to receive thefinal pressure of the furrow-slice and complete the turning of it. It thus takes the place of that part of the mold-board which in common plowsreceives the principal friction from the furrow-slice, and by this means the power required to draw the plow is much reduced. Y

By setting vthe roller in or out in the manner described the plow may be made to turn a furrow of greater or less width, and be thus -adapted to the character of the soil or strength of team. The effect upon the ground is also better than is .produced by a mold-board of common form.

Instead of plastering the surface, as is done by the common mold-board, the roller leaves described, with concave sides,-and mountedA upon aivertical, or nearly Vertical, shaft at the rear of the mold-board E, in the mannera-nd for the purposes specified.

2. The lever J, employed in connection withY a screw-shaft, H, and nut K, or eqnivalentdel vices, to adjust the rollerG and secure it in any position. y t jf 3.-.l`he combination, with the roller G and lever J, of the bracket I, constructed as de,-

` scribed, and employed for the attachment and securing of the said lever and the handle A', as explained;

AARON B. CHAPMAN.

Witnesses:`

Y CHARLES DU Bols, OoTAvIUs KNIGHT. 

